'Wonderful' is hardy in the ground in zones 8–11, where it shrugs off hot summers and mild winters. In zones 4–7 grow it in a large container on the patio and move it to shelter for winter. Wherever it lives, give it as much sun as you can — full sun drives the heaviest flowering and the sweetest fruit.
Planting
- Choose the sunniest, warmest spot available; pomegranates fruit best with full sun and good air circulation.
- Plant in well-draining soil. It tolerates many soil types but resents standing water, so amend heavy clay or plant on a slight mound.
- Dig the hole about twice as wide as the root ball and no deeper than the ball itself.
- Set the tree so the top of the root ball sits level with or just above the surrounding soil — don't plant too deep. Backfill, firm gently, and water in thoroughly to settle the roots.
- Apply 2–3 in. of mulch over the root zone to hold moisture, keeping it pulled back a few inches from the trunk.
Care & maintenance
- Water. Keep soil evenly moist the first season while roots establish. After that it's drought-tolerant, but consistent deep watering while fruit is sizing prevents the splitting that comes from wet-dry swings.
- Feed. Apply a balanced fertilizer in early spring as growth begins; avoid heavy nitrogen late in the season, which pushes leaves at the expense of fruit.
- Light & temperature. Full sun is essential. It performs best in regions with hot summers and is hardy in the ground to roughly the low 'teens (zone 8). In colder zones, overwinter container plants in an unheated garage or shed once they drop their leaves.
- Prune. Prune in late winter while dormant. Train to a few strong main stems or a single trunk, remove suckers and crossing branches, and lightly head back to encourage the new growth that bears flowers.
- Pollinate. 'Wonderful' is self-fertile, so one tree will fruit alone. Planting a second pomegranate or simply having bee activity can improve fruit set.
- Pests & disease. Generally trouble-free. Watch for aphids on new growth and the occasional leaf-footed bug; fruit splitting and sunburn are usually weather- and watering-related rather than disease.
- Harvest. Fruit ripens around September. Pick when the skin has turned deep red and the fruit makes a metallic sound when tapped; cut rather than pull to avoid tearing the branch.